Mimasyngenes ytu Galileo & Martins, 1996

Clarke, Robin O. S., 2007, Synopsis of the Bolivian species of MIMASYNGENES Breuning, 1950 (Coleoptera, Cerambycidae, Desmiphorini) with two new species, Papéis Avulsos de Zoologia (São Paulo) 47 (26), pp. 359-368 : 366-367

Mimasyngenes ytu Galileo & Martins, 1996

( Fig. 6 )

Redescription: Male. General colour: head, pronotum, antennae, legs and underside black, head, antennae, and pronotum in some examples, with blue reflection; elytra black with elongate fulvous patch covering humeri to adjacent epipleur. General pubescence uniform, recumbent, moderately long and grey above, longer on underside; elytra without rows of dense hair. Setae relatively short, ratio of longest ones to length of scape 2:3. General puncturation dense and large, especially on elytra, underside finely punctato-reticulate, metasternum more densely and heavily punctured.

Head below and behind inferior lobes slightly to moderately tumescent; frons with short, disorderly, contrasting white hair and medium sized punctures, interstices shining without microsculpture; eyes large and convex; superior lobes with 5-6 ommatidia/row, separated by 1,7 times their own width. Antenna relatively slender, reaching apex of elytra at about middle of antennomere X; scape (0,7 mm), moderately large and excised at base; antennomeres III (0,85 mm) and IV (0,8 mm) long, slightly shorter than protibia (1,0 mm), V-X (0,60- 0,35 mm) steadily decreasing, XI (0,4 mm).

Prothorax distinctly convex, quadrate, front margin slightly wider than hind margin; sides from lateral tubercle to front margin straight and convergent, behind tubercle very strongly constricted; lateral tubercle small, situated just behind middle, surmounted by long, straight or curved spine, spine directed backwards and slightly upturned. Pronotum: puncturation dense and deep, interstices shining and smooth (20x).

Elytra parallel sided, area around scutellum slightly raised, otherwise somewhat depressed; with twelve regular rows of heavy, deep, almost contiguous punctures (especially outermost), the rows almost complete to apex of elytra; interstices not reticulate, smooth and shining.

Femora not noticeably enlarged, weakly pedunculate, apices prominent and slightly flared, giving them a very characteristic appearance; metafemora lacking apical patch; metatibia slightly enlarged and lacking differentiated pubescence; metatarsus (0,8 mm) shorter than metatibia (1,1 mm).

Urosternite V slightly convex, as long as III+IV.

Sexual dimorphism: Female: superior lobes slightly wider apart, separated by twice their own width; antenna falling just short of elytral apex, III and IV of equal length (0,75-0,82 mm); metatibia slightly narrower than male; urosternite V distinctly convex, longer than III+IV, apex emarginate, centre of apical third occupied by distinct depression which reaches hind margin.

Variation: The Bolivian examples of M. ytu present little variation, even the fulvous coloured patch on the shoulders is always present and varies little in size; and all the specimens examined have setae with a distinctive clipped appearance, the apices not at all mucronate, most noticeably on frons, elytra and legs.

Measurements (mm): 3 males / 6 females respectively: total length 5,2-5,5/4,8-6,4; width of pronotum 1,4/1,1-1,3; length of pronotum 1,3/1,1-1,3; length of elytra 3,6-3,8/3,3-4,6, humeri 1,7-1,8/1,6-2,0.

Specimens examined: BOLIVIA, Santa Cruz: 17°29’96”S/ 63°39’13”W, 440 m, 5 km SSE Buena Vista, Hotel “Flora & Fauna”, R . Clarke/ S. Zamalloa col.: 2 females 10.X.2005 at MV / UV light, 21.X.2005 at white light ( MNRJ); 1 male and 1 female 21.X.2005 at UV light ( MZSP); 2 females 9.X.2005 at white light and MV / UV light, 2 males 22.X.2005, 11.X.2005 at white light, 1 female 21.X.2005 at MV / UV light ( RCSZ).

Discussion: Group 2 species. Readily identified by the fulvous patch at humerus. Originally described from SE Brazil, M. ytu is one of the growing number of Cerambycidae recently recorded for Bolivia (Wappes, et al., 2006) which, with our present day knowledge, would appear to have a disjunct distribution.

Figures

FIGURAS 1‑6: Mimasyngenes species.: 1, M. lepidotus sp. nov., holoptype o; 2, M. multisetosus sp. nov., holotype o; 3, M. quiuira Galileo & Martins, 1996, o; 4, M. lineatipennis Breuning, 1950, o; 5, M. venezuelensis Breuning, 1956, n; 6, M. ytu Galileo & Martins, 1996, n.